Abstract. We have updated the Regional Emission inventory in ASia (REAS) as version
2.1. REAS 2.1 includes most major air pollutants and greenhouse gases from
each year during 2000 and 2008 and following areas of Asia: East, Southeast,
South, and Central Asia and the Asian part of Russia. Emissions are estimated
for each country and region using updated activity data and parameters.
Monthly gridded data with a 0.25° × 0.25°
resolution are also provided. Asian emissions for each species in 2008 are as
follows (with their growth rate from 2000 to 2008): 56.9 Tg (+34%) for
SO2, 53.9 Tg (+54%) for NOx, 359.5 Tg (+34%) for CO,
68.5 Tg (+46%) for non-methane volatile organic compounds, 32.8 Tg
(+17%) for NH3, 36.4 Tg (+45%) for PM10, 24.7 Tg (+42%)
for PM2.5, 3.03 Tg (+35%) for black carbon, 7.72 Tg (+21%) for
organic carbon, 182.2 Tg (+32%) for CH4, 5.80 Tg (+18%) for
N2O, and 16.0 Pg (+57%) for CO2. By country, China and India were
respectively the largest and second largest contributors to Asian emissions.
Both countries also had higher growth rates in emissions than others because
of their continuous increases in energy consumption, industrial activities,
and infrastructure development. In China, emission mitigation measures have
been implemented gradually. Emissions of SO2 in China increased from
2000 to 2006 and then began to decrease as flue-gas desulphurization was
installed to large power plants. On the other hand, emissions of air
pollutants in total East Asia except for China decreased from 2000 to 2008
owing to lower economic growth rates and more effective emission regulations
in Japan, South Korea, and Taiwan. Emissions from other regions generally
increased from 2000 to 2008, although their relative shares of total Asian
emissions are smaller than those of China and India. Tables of annual
emissions by country and region broken down by sub-sector and fuel type, and
monthly gridded emission data with a resolution of 0.25° × 0.25° for the major sectors are available
from the following URL: http://www.nies.go.jp/REAS/.